Spatial Structure Analysis in Accordance with the Mode of Interconnection between Surface and Underground Pedestrian Networks Dongdaemun Stadium Neighborhood

Studies with relation to underground space and pedestrian networks overlook the issue of interconnection between the surface and underground network of pedestrian; a majority of studies base their analyses on mere recognition of underground space, design-related issues, or underground signs for directions. Although the use of underground space in Seoul is focused on pedestrian purposes, studies usually fail to go beyond issues such as entrance facilities to the underground space or pedestrian traffic, lacking comprehensive analyses concerning, for instance, pedestrian passage structure from underground to the surface. As such, this study aims to suggest an effective way of integrating the surface and underground network of pedestrian through analyzing various methods and effects of interconnection. There is no specified, or distinctive, way of evaluating spatial changes between the surface and underground that is different from evaluation methods for changes within the surface level in the present space syntax model. In other words, it is difficult to grasp the network structure of the surface and underground though factor analysis of the space for vertical movements. Thus the purpose of this study is to analyze the space for vertical movements with visual cognition, the concept which the present model fails to incorporate. Stairs mostly interconnect the surface and underground in the subject area, and such intermediary spaces are categorized based on the extent of information recognized visually. Each categorized space is, then, ranked in terms of the amount of visual influence, and maximum weighted values are assigned. Correlation analysis between the current pedestrian traffic volume and MD leads to the possible range of maximum weighted values; Ways in which pedestrians cognize the surface and underground pedestrian networks are speculated through correlation between the pedestrian traffic volume and depth of space. When weighted value is applied to the current network of pedestiran rather than depth of space, the depth of space becomes more correlated to the pedestrian movement. Also, underground space that is utilized as much as the surface level space prevails to have the same weighted value as that of surface level. Such result implies that pedestrians in Dongdaemun Stadium neighborhood perceive the depth of the surface and underground spaces to be the same, being independent of each other.